I've been around this forum long enough to appreciate your "take" on this topic, as you have re-iterated it many times . . .
My own opinion (FWIW) is that, as Users of these boards, we have the right to maintain them in working order
1) As long as we are able
2) By whatever means are at our disposal.
This may well include burning ROM images, if we are fortunate enough to discover where some "kind soul" has made them available . . .
In the normal course of events we would have got these from Yamaha, but a decision was obviously made by them to end support - and with it, access to various component parts - possibly purely a policy decision, but possibly also that the stockholdings had simply "run out" of certain parts.
Such decisions are always based on financial considerations (IME) such that Yamaha no longer expected to make significant money supporting these instruments. So they drew a line under them.
So - users are out in the cold and therefore have no choice other than to fend for themselves.
I see no harm in someone who HAS THE FACILITY, offering to do the burn on an ad hoc basis, either supplying the chips OR burning user's own chips, on an "at-cost + a few Beers" basis.
Whilst we like to help - it cannot be charity. No one should expect anyone to work for nothing.
I DO see harm in setting up a bulk "operation" as you have described. THAT is unashamedly about MAKING MONEY, and as you point out, often from someone else's work.
I absolutely APPLAUD what Brian has done/ IS doing in this respect. I have a number of his products, and my SY85 is as good as it ever was.
In Yamaha's eyes - the customer base is SMALL - as indeed are Brian's batches of product, indeed the Sweet16 project was MOSTLY dependent on customer-provided MCD64s. A real one-in, one-out deal.
With the ROM images, perhaps some users instruments have earlier firmware?
If support was still happening - they'd have got the updates from Yamaha - but cannot any longer.
So I see no "sin" in getting the upgrade along with the new ROMs.
As I've said before - I'm sure that our tiny customer base would be seen by Yamaha as "so much small fry" and would not make economic sense for them to get involved. Nor indeed would they consider there was any "mileage" in pi55ing-off existing (and potentially, Future) customers. They have much bigger fish to fry I'm sure.
All that said though, It would indeed be UNWISE NOT to be aware of legalities and thinking that are involved, when proceeding down these paths.
I'm rather of the opinion that if we DON'T MAKE BIG WAVES (NO pun intended) We won't invite a visit from the BIG FISH.
This is just my opinion, you understand